---
title: "CVE-2026-103039: Gravity Forms - Insecure Deserialization"
description: "Gravity Forms plugin for WordPress <= 3.1.2 contains a PHP Object Injection caused by unsafe unserialization in GFFormsModel::create_post(), letting unauthenticated attackers inject PHP objects into post meta, exploit requires presence of vulnerable gadget chains in plugins/themes or WordPress environment."
url: https://panop.io/threat-heartbeat/CVE-2026-103039/
---

# CVE-2026-103039 Gravity Forms - Insecure Deserialization

Gravity Forms plugin for WordPress <= 3.1.2 contains a PHP Object Injection caused by unsafe unserialization in GFFormsModel::create\_post(), letting unauthenticated attackers inject PHP objects into post meta, exploit requires presence of vulnerable gadget chains in plugins/themes or WordPress environment.

CVSS base score 9.8 /10

Critical

CISA KEV

Exploited in the wild

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.51% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103039)

## Details

Type

Insecure Deserialization

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Update to Gravity Forms version later than 3.1.2 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103039](https://nvd.nist.gov/vuln/detail/CVE-2026-103039)
- [https://patchstack.com/database/wordpress/plugin/gravityforms/vulnerability/wordpress-gravity-forms-plugin-3-1-2-unauthenticated-php-object-injection-vulnerability](https://patchstack.com/database/wordpress/plugin/gravityforms/vulnerability/wordpress-gravity-forms-plugin-3-1-2-unauthenticated-php-object-injection-vulnerability)
- [https://docs.gravityforms.com/](https://docs.gravityforms.com/)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/ec1fba15-81e5-42e3-9154-1978c3f81b26?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/ec1fba15-81e5-42e3-9154-1978c3f81b26?source=cve)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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